Classical Sanskrit is the Standardized form of the Sanskrit Language that was used from around 500 BCE to 1000 CE, primarily in the Indian Subcontinent, and is renowned for its Extensive literature, including Epic Poetry, drama, and Philosophical Texts. It is governed by the Grammar Rules codified by the ancient scholar Pāṇini, whose work, the 'Ashtadhyayi', remains a Foundational text for understanding Sanskrit Grammar and linguistics.